9.—(1) Subject to subsection (2) and (4) and section 11(2), a part-time employee shall not, in respect of his or her conditions of employment, be treated in a less favourable manner than a comparable full-time employee.

(2) Without prejudice to section 11(2), if treating a part-time employee, in respect of a particular condition of employment, in a less favourable manner than a comparable full-time employee can be justified on objective grounds then that employee may, notwithstanding subsection (1), be so treated.

(3) Nothing in subsection (2) shall be construed as affecting the application of a relevant enactment, by virtue of section 8, to a part-time employee.

(4) Subsection (1) shall, in so far, but only in so far, as it relates to any pension scheme or arrangement, not apply to a part-time employee whose normal hours of work constitute less than 20 per cent of the normal hours of work of a comparable full-time employee.

(5) For the avoidance of doubt, the reference in this section to a comparable full-time employee is a reference to such an employee either of the opposite sex to the part-time employee concerned or of the same sex as him or her.